Power grid partition load margin calculation method and device considering N-1 reliability

A technology of load margin and power grid partition, applied in circuit devices, AC networks with the same frequency from different sources, electrical components, etc., can solve the situation that it is difficult to accurately estimate the load distance limit of the power grid area, and the grid dispatching work is inconvenient. and other problems, to achieve the effect of adding automatic identification function, improving perception ability, and detailed results.

Active Publication Date: 2021-08-24
NARI TECH CO LTD +3
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  • Claims
  • Application Information

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Problems solved by technology

[0003] Due to the diversification of load types and distributed power sources in the current power grid operation, the real-time power of source loads is affected by many factors and changes in real time. Inconvenient, an effective load margin measurement and monitoring method is urgently needed

Method used

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  • Power grid partition load margin calculation method and device considering N-1 reliability
  • Power grid partition load margin calculation method and device considering N-1 reliability
  • Power grid partition load margin calculation method and device considering N-1 reliability

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Embodiment 1

[0050]The present invention proposes a load margin calculation method for power grid partitions considering N-1 reliability. Based on the real-time or future state power grid section, first search the topology for grid partitioning, and obtain the partition state information and equipment collection; for each key equipment in the partition According to the N-1 condition of the N-1 situation, iterate the load growth in the zone according to a certain step size, and adjust the power generation and reception of the zone to match the load growth. The most conservative load margin after all calculations of equipment N-1 is the load margin of the partition. The load margin calculation method is aimed at the power grid partition after topology search. Compared with the overall margin calculation of the whole network, the result is more detailed, and it is suitable for flexible power grids with adjustable resources. The algorithm fully considers the power grid model topology and power ...

Embodiment 2

[0100] Based on the same inventive concept as in Embodiment 1, a load margin calculation device for power grid partitions considering N-1 reliability of the present invention includes:

[0101] The power grid partition module is used to obtain the initial cross-section data of the target power grid, perform topology search and partition on the power grid according to the cross-section data of the power grid, and obtain the equipment collection and partition status information in each partition; the equipment collection includes: a partition generator collection, a partition key master Variable sets, various loads and equivalent loads;

[0102] The partition load adjustment simulation module is used to perform N-1 simulation on each key equipment in the equipment set in the partition for each partition: based on the status information of the partition, calculate the corresponding load of each partition in the partition after the power generation in the partition is adjusted to f...

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Abstract

The invention discloses a power grid partition load margin calculation method considering N-1 reliability, and the method comprises the steps of obtaining the partition state of a target power grid and the device information in each partition through the ground state load flow calculation and the high-voltage grade topology search partitions and based on an actual or predicted operation section of the target power grid; under the condition that a key device in a partition is N-1, adjusting the partition power generation to be full, then increasing the loads in the partitions according to a set step length, calculating the continuous power flow of the whole grid after each time of load increasing, iterating till device out-of-limit occurs, and then obtaining the load margin of the partition through calculation. According to the method, on the premise of considering the power grid partition and N-1 reliability, the power generation and utilization balance capability and the load margin of the power grid partition can be quickly and accurately calculated, the partition load margin online measurement and monitoring alarm functions are provided for the power grid, and the method has wide popularization value and application prospects.

Description

technical field [0001] The invention belongs to the technical field of power system operation automation, and in particular relates to a method for calculating load margins of power grid partitions considering N-1 reliability, and also relates to a calculation device for load margins of power grid partitions considering N-1 reliability. Background technique [0002] In the power system, the capacity and penetration rate of distributed clean energy represented by photovoltaics and wind power continue to grow on the power supply side, and its output volatility and uncertainty pose challenges to the stability and reliability of power grid operation; on the load side, electric vehicles, storage The proportion of new loads with dual characteristics of source and load represented by energy equipment continues to rise, and new forms of energy consumption such as load aggregators, smart buildings, and electric heating continue to emerge. It is necessary to further improve the econom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/06
CPCH02J3/00H02J3/06H02J2203/10H02J2203/20
Inventor 马晨霄陆娟娟王毅罗玉春闪鑫戴则梅张骥赵海峰郭耀松唐坚邱新宇田瑞平宋霄霄杨杰张元觉曹国芳彭龙杨科
Owner NARI TECH CO LTD
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